build: prevent subsystems.json from being gen

Actual files make terrible dependency targets in CMake.
Wrap the generation of subsystems.json into a custom
target to get around this. Fixes a problem where
parse_syscalls.py was being called multiple times.

Fixes: #23504

Signed-off-by: Andrew Boie <[email protected]>

Author: Andrew Boie

CMakeLists.txt

@@ -54,7 +54,7 @@ set(SYSCALL_LIST_H_TARGET      syscall_list_h_target)
 set(DRIVER_VALIDATION_H_TARGET driver_validation_h_target)
 set(KOBJ_TYPES_H_TARGET        kobj_types_h_target)
 set(LINKER_SCRIPT_TARGET       linker_script_target)
-
+set(PARSE_SYSCALLS_TARGET      parse_syscalls_target)
 
 define_property(GLOBAL PROPERTY PROPERTY_OUTPUT_FORMAT BRIEF_DOCS " " FULL_DOCS " ")
 set_property(   GLOBAL PROPERTY PROPERTY_OUTPUT_FORMAT elf32-little${ARCH}) # BFD format
@@ -598,6 +598,8 @@ add_custom_command(
   )
 
 add_custom_target(${SYSCALL_LIST_H_TARGET} DEPENDS             ${syscall_list_h})
+add_custom_target(${PARSE_SYSCALLS_TARGET}
+	          DEPENDS ${syscalls_json} ${subsys_json})
 
 # 64-bit systems do not require special handling of 64-bit system call
 # parameters or return values, indicate this to the system call boilerplate
@@ -617,7 +619,7 @@ add_custom_command(OUTPUT include/generated/syscall_dispatch.c ${syscall_list_h}
   --syscall-list     ${syscall_list_h}
   ${SYSCALL_LONG_REGISTERS_ARG}
   WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-  DEPENDS ${syscalls_json}
+  DEPENDS ${PARSE_SYSCALLS_TARGET}
   )
 
 # This is passed into all calls to the gen_kobject_list.py script.
@@ -634,7 +636,7 @@ add_custom_command(
   $<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--verbose>
   DEPENDS
   ${ZEPHYR_BASE}/scripts/gen_kobject_list.py
-  ${subsys_json}
+  ${PARSE_SYSCALLS_TARGET}
   WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
   )
 add_custom_target(${DRIVER_VALIDATION_H_TARGET} DEPENDS ${DRV_VALIDATION})
@@ -954,7 +956,7 @@ if(CONFIG_USERSPACE)
     $<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--verbose>
     DEPENDS
     ${ZEPHYR_PREBUILT_EXECUTABLE}
-    ${subsys_json}
+    ${PARSE_SYSCALLS_TARGET}
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
     )
   add_custom_target(obj_list DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${OBJ_LIST})

cmake/kobj.cmake

@@ -25,7 +25,7 @@ function(gen_kobj gen_dir_out)
     $<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--verbose>
     DEPENDS
     $ENV{ZEPHYR_BASE}/scripts/gen_kobject_list.py
-    ${subsys_json}
+    ${PARSE_SYSCALLS_TARGET}
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
     )
   add_custom_target(${KOBJ_TYPES_H_TARGET} DEPENDS ${KOBJ_TYPES} ${KOBJ_OTYPE})